package com.fas.core.plugin.shiro.kit;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

import org.apache.shiro.crypto.SecureRandomNumberGenerator;
import org.apache.shiro.crypto.hash.SimpleHash;
import org.apache.shiro.util.ByteSource;

import com.fas.hehe.system.model.User;

/**
 * 
 * TODO 测试文件 FOR 记住我加密
 *
 * @Copyright: Copyright (c) 2016 FAS
 * @anthor yixiaoping<thinker1013@163.com>
 * @since 2016年1月24日 下午10:14:56
 * @version V1.0
 */
public class PswdEnc2 {

	/**
	 * 加密
	 * 
	 * @param content
	 *            需要加密的内容
	 * @param password
	 *            加密密码
	 * @return
	 */
	public static byte[] encrypt(String content, String password) {
		try {
			KeyGenerator kgen = KeyGenerator.getInstance("AES");
			kgen.init(128, new SecureRandom(password.getBytes()));
			SecretKey secretKey = kgen.generateKey();
			byte[] enCodeFormat = secretKey.getEncoded();
			SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
			Cipher cipher = Cipher.getInstance("AES");// 创建密码器
			byte[] byteContent = content.getBytes("utf-8");
			cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
			byte[] result = cipher.doFinal(byteContent);
			return result; // 加密
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		} catch (InvalidKeyException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
		} catch (BadPaddingException e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * 解密
	 * 
	 * @param content
	 *            待解密内容
	 * @param password
	 *            解密密钥
	 * @return
	 */
	public static byte[] decrypt(byte[] content, String password) {
		try {
			KeyGenerator kgen = KeyGenerator.getInstance("AES");
			kgen.init(128, new SecureRandom(password.getBytes()));
			SecretKey secretKey = kgen.generateKey();
			byte[] enCodeFormat = secretKey.getEncoded();
			SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
			Cipher cipher = Cipher.getInstance("AES");// 创建密码器
			cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
			byte[] result = cipher.doFinal(content);
			return result; // 加密
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		} catch (InvalidKeyException e) {
			e.printStackTrace();
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
		} catch (BadPaddingException e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * 将二进制转换成16进制
	 * 
	 * @param buf
	 * @return
	 */
	public static String parseByte2HexStr(byte buf[]) {
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < buf.length; i++) {
			String hex = Integer.toHexString(buf[i] & 0xFF);
			if (hex.length() == 1) {
				hex = '0' + hex;
			}
			sb.append(hex.toUpperCase());
		}
		return sb.toString();
	}

	/**
	 * 将16进制转换为二进制
	 * 
	 * @param hexStr
	 * @return
	 */
	public static byte[] parseHexStr2Byte(String hexStr) {
		if (hexStr.length() < 1)
			return null;
		byte[] result = new byte[hexStr.length() / 2];
		for (int i = 0; i < hexStr.length() / 2; i++) {
			int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
			int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
			result[i] = (byte) (high * 16 + low);
		}
		return result;
	}

	public static void main(String[] args) {
	/*	String content = "1234567890123456";
		String password = "";
		// 加密
		System.out.println("加密前：" + content);
		byte[] encryptResult = encrypt(content, password);
		String encryptResultStr = parseByte2HexStr(encryptResult);
		System.out.println("加密后：" + encryptResultStr);
		// 解密
		byte[] decryptFrom = parseHexStr2Byte(encryptResultStr);
		byte[] decryptResult = decrypt(decryptFrom, password);
		System.out.println("解密后：" + new String(decryptResult));*/
		
		
		String algorithmName = "md5";
		String username = "yixiaoping";
		String password = "hehe2016";
		//String salt1 = username;
		//String salt2 = new SecureRandomNumberGenerator().nextBytes().toHex();
		int hashIterations = 2;
		SimpleHash hash = new SimpleHash(algorithmName, password, "yixiaoping"+"ea210ced1942a0a9fc69c025a67c02d8", hashIterations);
		String s1 = hash.toHex();
		String s2 = hash.toBase64();
		String s3 = hash.toString();
		
		User user = new User();
		user.setUsername("yixiaoping");
		user.setPassword("hehe2016");
		PasswordKit.me().encryptPassword(user);
		
		String a1 = user.getPassword();
		String a2 = user.getSalt();
		String a3 = user.getCredentialsSalt();
		System.out.println(a1);
		System.out.println(a2);
		System.out.println(a3);
		
		String old2 =PasswordKit.me().createPwd("hehe2016", "yixiaopingde648f2563e243ec48218bd30aa4e880");
		System.out.println(old2);
		
		
/*		
		System.out.println("dd1e98f55a19f9fe0742ecf9ef01d139");
		System.out.println("\n");
		System.out.println(s1);
		System.out.println(s2);
		System.out.println(s3);*/
	}

}